CN108459308A - A kind of analogue echoes method and device based on time-varying RCS data - Google Patents
A kind of analogue echoes method and device based on time-varying RCS data Download PDFInfo
- Publication number
- CN108459308A CN108459308A CN201810272502.8A CN201810272502A CN108459308A CN 108459308 A CN108459308 A CN 108459308A CN 201810272502 A CN201810272502 A CN 201810272502A CN 108459308 A CN108459308 A CN 108459308A
- Authority
- CN
- China
- Prior art keywords
- time
- signal
- radar
- echo
- varying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
The present invention relates to a kind of analogue echoes method and device based on time-varying RCS data, this method includes：The time-varying RCS sequences of extension target and its background are calculated according to radar sensor parameters simulation；For any sequence data in the sequence, zero padding processing is carried out to it so that consistent with the spectral resolution of radar emission signal after its zero padding；According to the sequence data after radar emission signal and zero padding to obtain echo-signal frequency spectrum；Inverse Fourier transform is carried out to echo-signal frequency spectrum, is obtained to be the time domain echo-signal with reference to time delay at the irradiation position of radar beam center；Quadrature demodulation and AD samplings are carried out to the time domain echo-signal after phase of echo compensates, obtained to be the radar echo signal with reference to time delay at radar antenna mouth face.The present invention can obtain the radar echo signal of feature rich using signal processing method on the basis of Electromagnetic Modeling means obtain Wide band scattering data by process flows such as time-frequency conversion, interpolation zero paddings.
Description
Technical field
The present invention relates to radar return simulation technical fields, more particularly to one kind being based on time-varying RCS (Radar-Cross
Section, Radar Cross Section) data analogue echoes method and device.
Background technology
Radar echo simulation method is in known radar echo character distribution character, using random counting method at present
And it is theoretical simulate the radar echo signal containing individual features, therefore signal characteristic is single.
Therefore, for the above deficiency, it is desirable to provide a kind of echo for the radar echo signal that can simulate feature rich
Analogy method.
Invention content
The technical problem to be solved in the present invention is that the radar echo signal feature simulated is single, in the prior art
Defect, a kind of analogue echoes method for the radar echo signal that can simulate feature rich is provided.
In order to solve the above technical problem, the present invention provides a kind of analogue echoes method based on time-varying RCS data, roots
It is directed toward the frequency domain parameter collection of sequence and radar emission signal according to radar sensor track sets, radar beam, utilizes frequency domain electricity
Magnetic models the time-varying RCS sequences of means simulation calculation extension target and its background, further includes：
For it is described extension target and its background time-varying RCS sequences in any time-varying RCS sequence datas, to it is described when
Become RCS sequence datas and carry out zero padding processing, so that the spectral resolution of the time-varying RCS sequence datas after zero padding is sent out with radar
The spectral resolution for penetrating signal is consistent；
According to after zero padding the time-varying RCS sequence datas, to radar emission signal carry out Fourier transformation obtained from
Emit signal spectrum, obtains echo-signal frequency spectrum；
Inverse Fourier transform is carried out to the echo-signal frequency spectrum, is obtained to be referred at the irradiation position of radar beam center
The time domain echo-signal of time delay；
Using the radar sensor track sets, phase of echo compensation is carried out to the time domain echo-signal；
Quadrature demodulation and AD samplings are carried out to the time domain echo-signal after phase compensation, obtained with radar antenna mouth
It is the radar echo signal with reference to time delay at face.
Preferably, the parameter field of the frequency domain parameter collection of the radar emission signal is：
{f|f0- B/2 ＜ f ＜ f0+B/2}
Wherein, f is the frequency domain parameter collection of the radar emission signal, f0For the carrier frequency of radar emission signal, B sends out for radar
Penetrate the bandwidth of signal.
Preferably, the time change interval of the time-varying RCS sequences of the extension target and its background meets formula one；
The formula one includes：
Δ t=1/fprf
Wherein, Δ t is the time change interval of the time-varying RCS sequences of the extension target and its background, fprfFor each arteries and veins
The pulse recurrence frequency of refunds wave.
Preferably, the zero padding, which is handled, includes：Zero padding mode is the zero padding behind frequency domain RCS data, and zero padding number is full
The zero padding of sufficient formula two is handled；
The formula two includes：
N1=N-B/ Δs f
Wherein, N1For the zero padding number, N is the sampling number of each pulse echo, and B is the band of radar emission signal
Width, Δ f are the sweep interval of each pulse echo.
Preferably, the echo-signal frequency spectrum is the time-varying RCS sequence datas and transmitting signal frequency after zero padding
The product of spectrum.
Preferably, radar beam center irradiation position includes：Radar sensor is in the time-varying RCS sequence datas pair
When the electromagnetic wave irradiation answered at position, and launched forms certain area to target and its background, the center of the certain area
Position.
Preferably, when carrying out the phase of echo compensation, the phase term of compensation meets formula three；
The formula three includes：
Wherein, i is sequence of the time-varying RCS sequence datas in the time-varying RCS sequences of the extension target and its background
Number,For the phase term of compensation, j is imaginary unit, and λ is the corresponding wavelength of carrier frequency of radar emission signal,Believe for radar emission
Number the corresponding wave number of carrier frequency,For the time-varying RCS sequence datas corresponding position and radar beam center irradiation position
Distance vector.
Preferably, the quadrature demodulation and AD, which are sampled, includes：Binary channels I, Q signal quadrature demodulation and AD samplings, and it is described
The sample rate of AD samplings meets formula four；
The formula four includes：
fs＞ B
Wherein, fsFor the time-domain sampling rate of radar emission signal, B is the bandwidth of radar emission signal.
The present invention also provides a kind of echo simulation devices based on time-varying RCS data, including：
Simulation computing unit, for being directed toward sequence and radar emission according to radar sensor track sets, radar beam
The frequency domain parameter collection of signal utilizes domain electromagnetic modeling means simulation calculation extension target and its time-varying RCS sequences of background；
Zero padding processing unit, for any time-varying RCS in the time-varying RCS sequences for the extension target and its background
Sequence data carries out zero padding processing to the time-varying RCS sequence datas, so that the time-varying RCS sequence datas after zero padding
Spectral resolution is consistent with the spectral resolution of radar emission signal；
First processing units, for according to after zero padding the time-varying RCS sequence datas, to radar emission signal carry out Fu
In emit signal spectrum obtained from leaf transformation, obtain echo-signal frequency spectrum；
Second processing unit carries out inverse Fourier transform to the echo-signal frequency spectrum, obtains to understand without being told in radar beam
It penetrates at position as the time domain echo-signal with reference to time delay；
Phase of echo compensating unit, for utilize the radar sensor track sets, to the time domain echo-signal into
Row phase of echo compensates；
Third processing unit is adopted for carrying out quadrature demodulation and AD to the time domain echo-signal after phase compensation
Sample is obtained to be the radar echo signal with reference to time delay at radar antenna mouth face.
Preferably, the parameter field of the frequency domain parameter collection of the radar emission signal is：
{f|f0- B/2 ＜ f ＜ f0+B/2}
Wherein, f is the frequency domain parameter collection of the radar emission signal, f0For the carrier frequency of radar emission signal, B sends out for radar
Penetrate the bandwidth of signal.
Preferably, the time change interval of the time-varying RCS sequences of the extension target and its background meets formula one；
The formula one includes：
Δ t=1/fprf
Wherein, Δ t is the time change interval of the time-varying RCS sequences of the extension target and its background, fprfFor each arteries and veins
The pulse recurrence frequency of refunds wave.
Preferably, the zero padding processing unit is specifically used for executing zero padding mode being the zero padding behind frequency domain RCS data,
And zero padding number meets the zero padding processing of formula two；
The formula two includes：
N1=N-B/ Δs f
Wherein, N1For the zero padding number, N is the sampling number of each pulse echo, and B is the band of radar emission signal
Width, Δ f are the sweep interval of each pulse echo.
Preferably, the first processing units, when being specifically used for determining that the echo-signal frequency spectrum is described after zero padding
Become the product of RCS sequence datas and the transmitting signal spectrum.
Preferably, radar beam center irradiation position includes：Radar sensor is in the time-varying RCS sequence datas pair
When the electromagnetic wave irradiation answered at position, and launched forms certain area to target and its background, the center of the certain area
Position.
Preferably, the phase of echo compensating unit, when being specifically used for carrying out the phase of echo compensation so that compensation
Phase term meets formula three；
The formula three includes：
Wherein, i is sequence of the time-varying RCS sequence datas in the time-varying RCS sequences of the extension target and its background
Number,For the phase term of compensation, j is imaginary unit, and λ is the corresponding wavelength of carrier frequency of radar emission signal,Believe for radar emission
Number the corresponding wave number of carrier frequency,For the time-varying RCS sequence datas corresponding position and radar beam center irradiation position
Distance vector.
Preferably, the third processing unit is specifically used for carrying out the time domain echo-signal after phase compensation
Binary channels I, Q signal quadrature demodulation and AD samplings, and the sample rate of AD samplings meets formula four；
The formula four includes：
fs＞ B
Wherein, fsFor the time-domain sampling rate of radar emission signal, B is the bandwidth of radar emission signal.
Implement the present invention, has the advantages that：The present invention provides a kind of echo moulds based on time-varying RCS data
Quasi- method, using signal processing method, is become by time-frequency on the basis of Electromagnetic Modeling means obtain Wide band scattering data
It changes, the process flows such as interpolation zero padding, obtains the radar echo signal of feature rich, feature includes amplitude scintillation characteristic, how general
Strangle frequency displacement and broadening, time-frequency two-dimensional high-resolution etc..At the same time, the present invention can be used for simulation wideband-radar signal, to solve
Existing radar echo simulation method of having determined is not suitable for the problem of simulating wideband-radar signal.
Description of the drawings
Fig. 1 is a kind of flow chart for analogue echoes method based on time-varying RCS data that the embodiment of the present invention one provides；
Fig. 2 is the schematic diagram that a kind of time domain echo-signal time delay reference that the embodiment of the present invention one provides illustrates；
Fig. 3 is the flow chart of another analogue echoes method based on time-varying RCS data provided by Embodiment 2 of the present invention；
Fig. 4 is a kind of schematic diagram for echo simulation device based on time-varying RCS data that the embodiment of the present invention three provides.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
As shown in Figure 1, an embodiment of the present invention provides a kind of analogue echoes methods based on RCS data, including：
Step 101：The frequency domain of sequence and radar emission signal is directed toward according to radar sensor track sets, radar beam
Parameter set utilizes domain electromagnetic modeling means simulation calculation extension target and its time-varying RCS sequences of background.
Step 102：For it is described extension target and its background time-varying RCS sequences in any time-varying RCS sequence datas,
Zero padding processing is carried out to the time-varying RCS sequence datas, so that the spectral resolution of the time-varying RCS sequence datas after zero padding
It is consistent with the spectral resolution of radar emission signal.
Step 103：According to after zero padding the time-varying RCS sequence datas, to radar emission signal carry out Fourier transformation
Obtained from emit signal spectrum, obtain echo-signal frequency spectrum.
Step 104：Inverse Fourier transform is carried out to the echo-signal frequency spectrum, is obtained with radar beam center irradiation position
Place is the time domain echo-signal with reference to time delay.
Step 105：Using the radar sensor track sets, phase of echo benefit is carried out to the time domain echo-signal
It repays.
Step 106：Quadrature demodulation and AD samplings are carried out to the time domain echo-signal after phase compensation, obtained with thunder
It is the radar echo signal with reference to time delay at up to Antenna aperture.
Since electromagnetic wave propagation speed is much larger than the speed of radar platform movement, it is possible to be approximately considered radar platform
After moving to some position, emit a pulse signal, be then parked in this position, it is waiting receive echo after be further continued for flight one
A pulse-recurrence time emits next pulse signal again after reaching next position, is then parked in next position and receives
Echo, and so on.
Based on the above, as shown in Fig. 2, providing a kind of schematic diagram that time domain echo-signal time delay reference illustrates.Please
With reference to figure 2, radar sensor track sets can be { Ti, and radar platform is currently located at TiAt position, radar sensor is in place
Set TiThe electromagnetic wave irradiation that place launches forms certain area, elliptic region as shown in Figure 2, area elliptica to target and its background
The center P points in domain can be with for current target-based coordinate system origin, i.e., at above-mentioned radar beam center irradiation position.
In detail, radar emission signal or radar time domain emit signal, can be divided into two major classes：One kind is non-time-varying
, i.e., each pulse signal that radar emission is gone out is the same；Another kind of is time-varying, i.e. radar emission is gone out
Each pulse signal is different, for example each pulse signal that radar emission is gone out is become by pre-designed rule
It is sent out again after changing.Accordingly, when radar emission signal type difference, Fourier transformation is carried out to obtain to radar emission signal
Emit the execution time correspondence difference of this realization process of signal spectrum.
Specifically, when radar emission signal is non-time-varying, this realization process can be pre- first carries out.For example,
Fourier transformation can be carried out to radar emission signal in advance to obtain transmitting signal spectrum before above-mentioned steps 101.To every
It, can be directly using the transmitting signal spectrum obtained in advance, to obtain echo when one time-varying RCS sequence data is handled
Signal spectrum.
Specifically, when radar emission signal is time-varying, the transmitting signal spectrum obtained in real time need to be used, thus it is every in processing
When one time-varying RCS sequence data, this realization process will be repeated.For example, can after above-mentioned steps 102, on
Before stating step 103, Fourier transformation is carried out to radar emission signal to obtain transmitting signal spectrum.In this way, being obtained using real-time
The transmitting signal spectrum gone out, to obtain echo-signal frequency spectrum.
In a kind of possible realization method of the embodiment of the present invention one, the ginseng of the frequency domain parameter collection of the radar emission signal
Number field is：{f|f0- B/2 ＜ f ＜ f0+B/2}
Wherein, f is the frequency domain parameter collection of the radar emission signal, f0For the carrier frequency of radar emission signal, B sends out for radar
Penetrate the bandwidth of signal.
In a kind of possible realization method of the embodiment of the present invention one, the time-varying RCS sequences of the extension target and its background
The time change interval of row meets following formula (1)；
Δ t=1/fprf (1)
Wherein, Δ t is the time change interval of the time-varying RCS sequences of the extension target and its background, fprfFor each arteries and veins
The pulse recurrence frequency of refunds wave.
In embodiment one, above-mentioned domain electromagnetic modeling means can be domain electromagnetic modeling means generally in the art, than
Such as physical optical method, Shooting and bouncing rays.
In a kind of possible realization method of the embodiment of the present invention one, realization side is handled in order to illustrate a kind of possible zero padding
Formula, so, the zero padding processing includes：Zero padding mode is the zero padding behind frequency domain RCS data, and zero padding number meets following public affairs
The zero padding of formula (2) is handled；
N1=N-B/ Δs f (2)
Wherein, N1For the zero padding number, N is the sampling number of each pulse echo, and B is the band of radar emission signal
Width, Δ f are the sweep interval of each pulse echo.
In a kind of possible realization method of the embodiment of the present invention one, the echo-signal frequency spectrum be zero padding after it is described when
Become the product of RCS sequence datas and the transmitting signal spectrum.
In a kind of possible realization method of the embodiment of the present invention one, radar beam center irradiation position includes：Thunder
Up to sensor in the time-varying RCS sequence datas corresponding position, and the electromagnetic wave irradiation launched is to target and its background shape
When at certain area, the center of the certain area.
As an example it is assumed that the time-varying RCS sequence datas of present analysis correspond to the T in Fig. 2iPosition, referring to FIG. 2,
Understand that radar platform is located at TiWhen at position, radar sensor is in position TiThe electromagnetic wave irradiation that place launches is to target and its back of the body
Scape forms elliptic region, the center of the elliptic region or target-based coordinate system origin, i.e. P points position in Fig. 2, you can
Think above-mentioned radar beam center irradiation position.
In a kind of possible realization method of the embodiment of the present invention one, when carrying out the phase of echo compensation, the phase of compensation
Position item meets following formula (3)；
Wherein, i is sequence of the time-varying RCS sequence datas in the time-varying RCS sequences of the extension target and its background
Number,For the phase term of compensation, j is imaginary unit, and λ is the corresponding wavelength of carrier frequency of radar emission signal,For radar emission
The corresponding wave number of carrier frequency of signal,Position is irradiated for the time-varying RCS sequence datas corresponding position and the radar beam center
The distance vector set.
λ in formula (3) is the corresponding wavelength of carrier frequency of radar emission signal, and specifically, this wavelength can be the light velocity
Divided by the quotient obtained by the carrier frequency of radar emission signal.That is, λ=C/f0, wherein C is the light velocity, f0For the load of radar emission signal
Frequently.
As an example it is assumed that the time-varying RCS sequence datas of present analysis correspond to the T in Fig. 2iPosition, referring to FIG. 2,This distance vector can be with for radar sensor position TiWith the distance vector of P points
In a kind of possible realization method of the embodiment of the present invention one, the quadrature demodulation and AD samplings include：Binary channels
I, Q signal quadrature demodulation and AD samplings, and the sample rate of AD samplings meets following formula (4)；
fs＞ B (4)
Wherein, fsFor the time-domain sampling rate of radar emission signal, B is the bandwidth of radar emission signal.
In detail, for the time domain echo-signal after phase compensation, A/D samplings and the roads Q on the roads I can be carried out respectively
A/D is sampled.
As an example it is assumed that the time-varying RCS sequence datas of present analysis correspond to the T in Fig. 2iPosition, referring to FIG. 2,
With for the radar echo signal with reference to time delay, i.e., reference position is in radar sensor position T at radar antenna mouth faceiPlace, at this time
Radar return be only the time domain echo-signal that practical radar receives.
Embodiment two
As shown in figure 3, an embodiment of the present invention provides a kind of analogue echoes methods based on RCS data, including：
Step 301：Determine the carrier frequency f of radar emission signal0, the bandwidth B of radar emission signal, radar emission signal when
Domain sample rate fs, the sampling number N of each pulse echo, the sweep interval Δ f of each pulse echo, each pulse echo arteries and veins
Rush repetition rate fprf, radar platform track sets { Ti, beam position sequence { di}。
Step 302：According to radar sensor track sets { Ti, radar beam be directed toward sequence { diAnd radar emission letter
Number frequency domain parameter collection f, the time-varying RCS sequences of target and its background, and the sequence are extended using physical optical method simulation calculation
Time change between be divided into the pulse recurrence frequency f of each pulse echoprfInverse.
It in detail, can be previously according to the carrier frequency f of radar emission signal0And bandwidth B, calculate the frequency of radar emission signal
The parameter field of field parameter collection f, i.e., f | f0- B/2 ＜ f ＜ f0+B/2}。
Step 303：For any time-varying RCS sequence datas in the time-varying RCS sequences of extension target and its background, to this
Time-varying RCS sequence datas carry out zero padding processing, and zero padding mode is the zero padding behind frequency domain RCS data, and zero padding number meets phase
Answer preset formula, and the spectral resolution one of the spectral resolution and radar emission signal of the time-varying RCS sequence datas after zero padding
It causes.
Here the same above-mentioned formula of preset formula (2).
Step 304：According to after zero padding time-varying RCS sequence datas, to radar emission signal carry out Fourier transformation and obtain
The transmitting signal spectrum arrived determines that the product of the two is echo-signal frequency spectrum.
Step 305：Inverse Fourier transform is carried out to echo-signal frequency spectrum, is obtained to be at the irradiation position of radar beam center
With reference to the time domain echo-signal of time delay, radar beam center irradiation position is that radar sensor is corresponded in time-varying RCS sequence datas
At position, and when the electromagnetic wave irradiation launched forms elliptic region to target and its background, the center of the elliptic region.
It please refers to Fig.2, it is assumed that the time-varying RCS sequence datas of present analysis correspond to the T in Fig. 2iPosition, therefore the P in Fig. 2
Point position, you can with for radar beam center irradiation position.
Step 306：Using radar sensor track sets, phase of echo compensation is carried out to time domain echo-signal, and compensate
Phase term meet corresponding preset formula.
Here the same above-mentioned formula of preset formula (3).
Step 307：Binary channels I, Q signal quadrature demodulation and AD are carried out to the time domain echo-signal after phase compensation to adopt
Sample, and the time-domain sampling rate f of radar emission signalsMore than the bandwidth B of radar emission signal, to obtain at radar antenna mouth face
For the radar echo signal with reference to time delay.
It is described simultaneously, the T in Fig. 2 is corresponded to due to the time-varying RCS sequence datas of present analysisiPosition, therefore with radar day
It is the radar echo signal with reference to time delay at line mouth face, i.e., reference position is in radar sensor position TiPlace, radar at this time return
Wave is only the time domain echo-signal that practical radar receives.
Embodiment three
As shown in figure 4, an embodiment of the present invention provides a kind of echo simulation devices based on time-varying RCS data, including：
Simulation computing unit 401, for being directed toward sequence and radar hair according to radar sensor track sets, radar beam
The frequency domain parameter collection for penetrating signal utilizes domain electromagnetic modeling means simulation calculation extension target and its time-varying RCS sequences of background；
Zero padding processing unit 402, for any time-varying in the time-varying RCS sequences for the extension target and its background
RCS sequence datas carry out zero padding processing, so that the time-varying RCS sequence datas after zero padding to the time-varying RCS sequence datas
Spectral resolution it is consistent with the spectral resolution of radar emission signal；
First processing units 403, for according to after zero padding the time-varying RCS sequence datas, to radar emission signal into
Emit signal spectrum obtained from row Fourier transformation, obtains echo-signal frequency spectrum；
Second processing unit 404 carries out inverse Fourier transform to the echo-signal frequency spectrum, obtains with radar beam center
It is the time domain echo-signal with reference to time delay at irradiation position；
Phase of echo compensating unit 405, for utilizing the radar sensor track sets, to the time domain echo-signal
Carry out phase of echo compensation；
Third processing unit 406, for carrying out quadrature demodulation and AD to the time domain echo-signal after phase compensation
Sampling is obtained to be the radar echo signal with reference to time delay at radar antenna mouth face.
In a kind of possible realization method of the embodiment of the present invention three, the ginseng of the frequency domain parameter collection of the radar emission signal
Number field is：{f|f0- B/2 ＜ f ＜ f0+B/2}
Wherein, f is the frequency domain parameter collection of the radar emission signal, f0For the carrier frequency of radar emission signal, B sends out for radar
Penetrate the bandwidth of signal.
In a kind of possible realization method of the embodiment of the present invention three, the time-varying RCS sequences of the extension target and its background
The time change interval of row meets above-mentioned formula (1).
In a kind of possible realization method of the embodiment of the present invention three, the zero padding processing unit 402 is specifically used for executing
Zero padding mode is the zero padding behind frequency domain RCS data, and zero padding number meets the zero padding processing of above-mentioned formula (2).
In a kind of possible realization method of the embodiment of the present invention three, the first processing units 403 are specifically used for determining
The echo-signal frequency spectrum is the product of the time-varying RCS sequence datas and the transmitting signal spectrum after zero padding.
In a kind of possible realization method of the embodiment of the present invention three, radar beam center irradiation position includes：Thunder
Up to sensor in the time-varying RCS sequence datas corresponding position, and the electromagnetic wave irradiation launched is to target and its background shape
When at certain area, the center of the certain area.
In a kind of possible realization method of the embodiment of the present invention three, the phase of echo compensating unit 405 is specifically used for
When carrying out the phase of echo compensation so that the phase term of compensation meets above-mentioned formula (3).
In a kind of possible realization method of the embodiment of the present invention three, the third processing unit 406 is specifically used for warp
The time domain echo-signal after phase compensation carries out binary channels I, Q signal quadrature demodulation and AD and samples, and AD samplings
Sample rate meets above-mentioned formula (4).
The contents such as the information exchange between each unit, implementation procedure in above-mentioned apparatus, due to implementing with the method for the present invention
Example is based on same design, and particular content can be found in the narration in the method for the present invention embodiment, and details are not described herein again.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, it will be understood by those of ordinary skill in the art that：It still may be used
With technical scheme described in the above embodiments is modified or equivalent replacement of some of the technical features；
And these modifications or replacements, various embodiments of the present invention technical solution that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of analogue echoes method based on time-varying Radar Cross Section RCS data, which is characterized in that sensed according to radar
Device track sets, radar beam are directed toward the frequency domain parameter collection of sequence and radar emission signal, utilize domain electromagnetic modeling means
Simulation calculation extends the time-varying RCS sequences of target and its background, further includes：
For any time-varying RCS sequence datas in the time-varying RCS sequences of the extension target and its background, to the time-varying
RCS sequence datas carry out zero padding processing, so that the spectral resolution and radar emission of the time-varying RCS sequence datas after zero padding
The spectral resolution of signal is consistent；
According to after zero padding the time-varying RCS sequence datas, to radar emission signal carry out Fourier transformation obtained from emit
Signal spectrum obtains echo-signal frequency spectrum；
Inverse Fourier transform is carried out to the echo-signal frequency spectrum, is obtained to be with reference to time delay at the irradiation position of radar beam center
Time domain echo-signal；
Using the radar sensor track sets, phase of echo compensation is carried out to the time domain echo-signal；
Quadrature demodulation and AD samplings are carried out to the time domain echo-signal after phase compensation, obtained at radar antenna mouth face
For the radar echo signal with reference to time delay.
2. the analogue echoes method according to claim 1 based on time-varying RCS data, it is characterised in that：
The parameter field of the frequency domain parameter collection of the radar emission signal is：
{f|f0- B/2 ＜ f ＜ f0+B/2}
Wherein, f is the frequency domain parameter collection of the radar emission signal, f0For the carrier frequency of radar emission signal, B believes for radar emission
Number bandwidth；
And/or
The time change interval of the time-varying RCS sequences of the extension target and its background meets formula one；
The formula one includes：
Δ t=1/fprf
Wherein, Δ t is the time change interval of the time-varying RCS sequences of the extension target and its background, fprfIt is returned for each pulse
The pulse recurrence frequency of wave.
3. the analogue echoes method according to claim 1 based on time-varying RCS data, it is characterised in that：
The zero padding is handled：Zero padding mode is the zero padding behind frequency domain RCS data, and zero padding number meets the benefit of formula two
Zero processing；
The formula two includes：
N1=N-B/ Δs f
Wherein, N1For the zero padding number, N is the sampling number of each pulse echo, and B is the bandwidth of radar emission signal, Δ f
For the sweep interval of each pulse echo；
And/or
The echo-signal frequency spectrum is the product of the time-varying RCS sequence datas and the transmitting signal spectrum after zero padding.
4. the analogue echoes method according to claim 1 based on time-varying RCS data, it is characterised in that：
Radar beam center irradiation position includes：Radar sensor in the time-varying RCS sequence datas corresponding position, and
When the electromagnetic wave irradiation launched forms certain area to target and its background, the center of the certain area；
And/or
When carrying out the phase of echo compensation, the phase term of compensation meets formula three；
The formula three includes：
Wherein, i is serial number of the time-varying RCS sequence datas in the time-varying RCS sequences of the extension target and its background,
For the phase term of compensation, j is imaginary unit, and λ is the corresponding wavelength of carrier frequency of radar emission signal,For radar emission signal
The corresponding wave number of carrier frequency,For the time-varying RCS sequence datas corresponding position and radar beam center irradiation position away from
From vector.
5. according to any analogue echoes method based on time-varying RCS data in Claims 1-4, it is characterised in that：
The quadrature demodulation and AD samplings include：Binary channels I, Q signal quadrature demodulation and AD samplings, and the sampling of AD samplings
Rate meets formula four；
The formula four includes：
fs＞ B
Wherein, fsFor the time-domain sampling rate of radar emission signal, B is the bandwidth of radar emission signal.
6. a kind of echo simulation device based on time-varying Radar Cross Section RCS data, which is characterized in that including：
Simulation computing unit, for being directed toward sequence and radar emission signal according to radar sensor track sets, radar beam
Frequency domain parameter collection, utilize domain electromagnetic modeling means simulation calculation extension target and its background time-varying RCS sequences；
Zero padding processing unit, for any time-varying RCS sequences in the time-varying RCS sequences for the extension target and its background
Data carry out zero padding processing, so that the frequency spectrum of the time-varying RCS sequence datas after zero padding to the time-varying RCS sequence datas
Resolution ratio is consistent with the spectral resolution of radar emission signal；
First processing units, for according to after zero padding the time-varying RCS sequence datas, to radar emission signal carry out Fourier
Emit signal spectrum obtained from transformation, obtains echo-signal frequency spectrum；
Second processing unit carries out inverse Fourier transform to the echo-signal frequency spectrum, obtains irradiating position with radar beam center
Place is set as the time domain echo-signal with reference to time delay；
Phase of echo compensating unit returns the time domain echo-signal for utilizing the radar sensor track sets
Wave phase compensates；
Third processing unit is obtained for carrying out quadrature demodulation and AD samplings to the time domain echo-signal after phase compensation
It is the radar echo signal with reference to time delay at radar antenna mouth face.
7. the echo simulation device according to claim 6 based on time-varying RCS data, it is characterised in that：
The parameter field of the frequency domain parameter collection of the radar emission signal is：
{f|f0- B/2 ＜ f ＜ f0+B/2}
Wherein, f is the frequency domain parameter collection of the radar emission signal, f0For the carrier frequency of radar emission signal, B believes for radar emission
Number bandwidth；
And/or
The time change interval of the time-varying RCS sequences of the extension target and its background meets formula one；
The formula one includes：
Δ t=1/fprf
Wherein, Δ t is the time change interval of the time-varying RCS sequences of the extension target and its background, fprfIt is returned for each pulse
The pulse recurrence frequency of wave.
8. the echo simulation device according to claim 6 based on time-varying RCS data, it is characterised in that：
The zero padding processing unit is specifically used for executing zero padding mode being the zero padding behind frequency domain RCS data, and zero padding number is full
The zero padding of sufficient formula two is handled；
The formula two includes：
N1=N-B/ Δs f
Wherein, N1For the zero padding number, N is the sampling number of each pulse echo, and B is the bandwidth of radar emission signal, Δ f
For the sweep interval of each pulse echo；
And/or
The first processing units are specifically used for determining that the echo-signal frequency spectrum is the time-varying RCS sequence numbers after zero padding
According to the product with the transmitting signal spectrum.
9. the echo simulation device according to claim 6 based on time-varying RCS data, it is characterised in that：
Radar beam center irradiation position includes：Radar sensor in the time-varying RCS sequence datas corresponding position, and
When the electromagnetic wave irradiation launched forms certain area to target and its background, the center of the certain area；
And/or
The phase of echo compensating unit, when being specifically used for carrying out the phase of echo compensation so that the phase term of compensation meets
Formula three；
The formula three includes：
Wherein, i is serial number of the time-varying RCS sequence datas in the time-varying RCS sequences of the extension target and its background,
For the phase term of compensation, j is imaginary unit, and λ is the corresponding wavelength of carrier frequency of radar emission signal,For radar emission signal
The corresponding wave number of carrier frequency,For the time-varying RCS sequence datas corresponding position and radar beam center irradiation position away from
From vector.
10. according to any echo simulation device based on time-varying RCS data in claim 6 to 9, it is characterised in that：
The third processing unit is specifically used for carrying out binary channels I, Q letter to the time domain echo-signal after phase compensation
Number quadrature demodulation and AD samplings, and the sample rate of AD samplings meets formula four；
The formula four includes：
fs＞ B
Wherein, fsFor the time-domain sampling rate of radar emission signal, B is the bandwidth of radar emission signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810272502.8A CN108459308B (en) | 2018-03-29 | 2018-03-29 | Echo simulation method and device based on time-varying RCS data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810272502.8A CN108459308B (en) | 2018-03-29 | 2018-03-29 | Echo simulation method and device based on time-varying RCS data |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108459308A true CN108459308A (en) | 2018-08-28 |
| CN108459308B CN108459308B (en) | 2021-03-02 |
Family
ID=63237784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810272502.8A Active CN108459308B (en) | 2018-03-29 | 2018-03-29 | Echo simulation method and device based on time-varying RCS data |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108459308B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459736A (en) * | 2019-01-04 | 2019-03-12 | 北京环境特性研究所 | A kind of radar drone design method and apparatus |
| CN109901166A (en) * | 2019-03-28 | 2019-06-18 | 中国人民解放军战略支援部队航天工程大学 | A method of it quickly generates and simulation ISAR echo data |
| CN110531329A (en) * | 2019-09-25 | 2019-12-03 | 中南大学 | A kind of multichannel error self-correcting method for impulse formula through-wall radar |
| CN111443333A (en) * | 2020-04-07 | 2020-07-24 | 上海无线电设备研究所 | Multi-azimuth matching signal generation method based on spectrum synthesis |
| CN112153796A (en) * | 2020-09-27 | 2020-12-29 | 西安电子科技大学 | Method for measuring time-varying plasma electron density jitter frequency |
| CN112799063A (en) * | 2020-12-25 | 2021-05-14 | 北京环境特性研究所 | Double-station scattering center modeling method based on bounce ray method |
| CN116718996A (en) * | 2023-08-10 | 2023-09-08 | 南京航天工业科技有限公司 | DRFM-based one-dimensional HRRP target simulation method and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064062A (en) * | 2011-10-24 | 2013-04-24 | 中国航天科工集团第二研究院二〇七所 | Special absorption rate (SAR) raw data generating method based on broadband frequency sweeping data |
| CN103093057A (en) * | 2013-02-03 | 2013-05-08 | 大连理工大学 | Marine navigation radar signal simulation method |
| CN105260524A (en) * | 2015-09-28 | 2016-01-20 | 大连理工大学 | Method for simulating two-dimensional echo sequence image of ship navigation radar in scanning state |
| CN107479038A (en) * | 2017-07-21 | 2017-12-15 | 北京雷久科技有限责任公司 | A kind of High Accuracy Radar target echo real time simulation method |
-
2018
- 2018-03-29 CN CN201810272502.8A patent/CN108459308B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103064062A (en) * | 2011-10-24 | 2013-04-24 | 中国航天科工集团第二研究院二〇七所 | Special absorption rate (SAR) raw data generating method based on broadband frequency sweeping data |
| CN103093057A (en) * | 2013-02-03 | 2013-05-08 | 大连理工大学 | Marine navigation radar signal simulation method |
| CN105260524A (en) * | 2015-09-28 | 2016-01-20 | 大连理工大学 | Method for simulating two-dimensional echo sequence image of ship navigation radar in scanning state |
| CN107479038A (en) * | 2017-07-21 | 2017-12-15 | 北京雷久科技有限责任公司 | A kind of High Accuracy Radar target echo real time simulation method |
Non-Patent Citations (1)
| Title |
|---|
| 宁超 等: "高速运动目标宽带雷达回波频域模拟及分析", 《雷达学报》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109459736A (en) * | 2019-01-04 | 2019-03-12 | 北京环境特性研究所 | A kind of radar drone design method and apparatus |
| CN109901166A (en) * | 2019-03-28 | 2019-06-18 | 中国人民解放军战略支援部队航天工程大学 | A method of it quickly generates and simulation ISAR echo data |
| CN110531329A (en) * | 2019-09-25 | 2019-12-03 | 中南大学 | A kind of multichannel error self-correcting method for impulse formula through-wall radar |
| CN110531329B (en) * | 2019-09-25 | 2023-06-27 | 中南大学 | Multichannel error self-correction method for impulse type through-wall radar |
| CN111443333A (en) * | 2020-04-07 | 2020-07-24 | 上海无线电设备研究所 | Multi-azimuth matching signal generation method based on spectrum synthesis |
| CN112153796A (en) * | 2020-09-27 | 2020-12-29 | 西安电子科技大学 | Method for measuring time-varying plasma electron density jitter frequency |
| CN112799063A (en) * | 2020-12-25 | 2021-05-14 | 北京环境特性研究所 | Double-station scattering center modeling method based on bounce ray method |
| CN112799063B (en) * | 2020-12-25 | 2023-11-14 | 北京环境特性研究所 | Double-station scattering center modeling method based on bouncing ray method |
| CN116718996A (en) * | 2023-08-10 | 2023-09-08 | 南京航天工业科技有限公司 | DRFM-based one-dimensional HRRP target simulation method and system |
| CN116718996B (en) * | 2023-08-10 | 2023-11-03 | 南京航天工业科技有限公司 | DRFM-based one-dimensional HRRP target simulation method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108459308B (en) | 2021-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108459308A (en) | A kind of analogue echoes method and device based on time-varying RCS data | |
| CN103698763B (en) | Based on the linear array SAR sparse formation method of hard-threshold orthogonal matching pursuit | |
| CN103869311B (en) | Real beam scanning radar super-resolution imaging method | |
| CN110850376B (en) | Foil strip interference simulation method and foil strip interference simulator | |
| CN107346017B (en) | The intensive target simulation method of pulse compression radar based on frequency matching filtering | |
| CN106597425B (en) | A kind of radar target localization method based on machine learning | |
| CN107271977A (en) | High-precision SAR echo simulation methods based on mobile driving source FDTD algorithms | |
| CN109001697A (en) | A kind of multiple target radar echo simulator | |
| CN103941250B (en) | A kind of ocean channel simulation method in passive sonar array signal emulation | |
| CN106291489A (en) | It is applicable to the synthetic aperture radar echo simulation method of multiple transmitting signal waveform | |
| CN110879391B (en) | Radar image data set manufacturing method based on electromagnetic simulation and missile-borne echo simulation | |
| Jasiński | A generic validation scheme for real-time capable automotive radar sensor models integrated into an autonomous driving simulator | |
| CN106680791A (en) | Radar echo simulating method based on broadband sweep frequency data | |
| CN106199578B (en) | Hypersonic target speed-measuring method | |
| CN105372637A (en) | Radar narrowband deception jamming method based on inching characteristic of moving vehicle object | |
| CN114282363A (en) | Radar warning equipment simulation system based on digital domain | |
| CN102012510A (en) | Inverse synthetic aperture radar imaging method based on time-phase derivative distribution | |
| CN107133385B (en) | Multi-mode synthetic aperture radar echo signal simulation method based on mode variation | |
| Karakasiliotis et al. | Two-dimensional ISAR model and image reconstruction with stepped frequency-modulated signal | |
| CN105548959A (en) | Multi-sensor multi-target positioning method based on sparse reconstruction | |
| CN110850396B (en) | Electric simulator applied to deep sea black box search and exploration positioning system and track generation method thereof | |
| CN109884621B (en) | Radar altimeter echo coherent accumulation method | |
| Given et al. | Generalized ISAR-part I: An optimal method for imaging large naval vessels | |
| CN106291126B (en) | Complex electromagnetic environment time-domain signal analogy method based on variable sampling rate | |
| CN109188378B (en) | Ultrasonic Doppler echo signal simulation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |